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/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Zhenyu Wang <zhenyu.z.wang@intel.com>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <pciaccess.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "intel_io.h"
#include "intel_reg.h"
#include "intel_chipset.h"
#define SWF14_LID_STATUS_CLOSED (1<<29) /* 0 here means open */
enum lid_status {
LID_UNKNOWN = -1,
LID_OPEN,
LID_CLOSE,
};
#define ACPI_BUTTON "/proc/acpi/button/"
#define ACPI_LID "/proc/acpi/button/lid/"
static int i830_lvds_acpi_lid_state(void)
{
int fd;
DIR *button_dir;
DIR *lid_dir;
struct dirent *lid_dent;
char *state_name;
char state[64];
enum lid_status ret = LID_UNKNOWN;
button_dir = opendir(ACPI_BUTTON);
/* If acpi button driver is not loaded, bypass ACPI check method */
if (button_dir == NULL)
goto out;
closedir(button_dir);
lid_dir = opendir(ACPI_LID);
/* no acpi lid object found */
if (lid_dir == NULL)
goto out;
while (1) {
lid_dent = readdir(lid_dir);
if (lid_dent == NULL) {
/* no LID object */
closedir(lid_dir);
goto out;
}
if (strcmp(lid_dent->d_name, ".") &&
strcmp(lid_dent->d_name, "..")) {
break;
}
}
state_name = malloc(strlen(ACPI_LID) + strlen(lid_dent->d_name) + 7);
memset(state_name, 0, strlen(ACPI_LID) + strlen(lid_dent->d_name) + 7);
strcat(state_name, ACPI_LID);
strcat(state_name, lid_dent->d_name);
strcat(state_name, "/state");
closedir(lid_dir);
if ((fd = open(state_name, O_RDONLY)) == -1) {
free(state_name);
goto out;
}
free(state_name);
if (read(fd, state, 64) == -1) {
close(fd);
goto out;
}
close(fd);
if (strstr(state, "open"))
ret = LID_OPEN;
else if (strstr(state, "closed"))
ret = LID_CLOSE;
else /* "unsupported" */
ret = LID_UNKNOWN;
out:
return ret;
}
int main(int argc, char **argv)
{
struct intel_mmio_data mmio_data;
int swf14, acpi_lid;
intel_mmio_use_pci_bar(&mmio_data, intel_get_pci_device());
while (1) {
swf14 = INREG(SWF14);
printf("Intel LVDS Lid status:\n");
printf("\tSWF14(0x%x) : %s\n", swf14,
swf14 & SWF14_LID_STATUS_CLOSED ? "close" : "open");
acpi_lid = i830_lvds_acpi_lid_state();
switch (acpi_lid) {
case LID_UNKNOWN:
printf("\tACPI Lid state : unknown\n");
break;
case LID_OPEN:
printf("\tACPI Lid state : open\n");
break;
case LID_CLOSE:
printf("\tACPI Lid state : close\n");
break;
}
sleep(2);
}
return 0;
}
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